【摘要】：振動在自然界中普遍存在。但振動通常對結構是有害的,因此,對振動進行控制具有重要意義。但振動控制中的主動控制系統(tǒng)體積龐大、且耗能多等,而被動控制環(huán)境適應能力比較差,因而,半主動控制在很多場合成為首選方案。本文將壓電半主動控制與壓電能量收集技術相結合,在有效控制振動的同時,還可以實現能量收集。論文首先結合壓電材料的機電耦合特性,對非線性同步開關阻尼(SSD)的半主動控制系統(tǒng)建立了理論模型。在此基礎上分析了SSD技術(包括SSDI、SSDS、SSDV、改進型SSDS)的工作原理,并推導出了各個控制方法在一個周期內的機電轉換能量值的表達式。針對于該技術中的關鍵技術-開關設計,本文采用了一種無源峰值檢測開關電路實現其功能,并詳細推導了其與SSDI、SSDS技術相結合時可以實現不同的閉合時間。同時,通過實驗的方法確定了該半主動控制系統(tǒng)中SSDV技術的最優(yōu)外接電壓;其次,對半主動控制系統(tǒng)的實現電路進行了改進,將壓電元件在振動過程中產生的電荷輸出或存儲。從理論上分析了其工作原理,詳細推導了其輸出電壓和輸出功率;最后,本文還將能量收集技術與SSDV半主動控制相結合,依據實驗結果,設計適當的穩(wěn)壓電路,通過一定的開關控制策略,為SSDV半主動控制系統(tǒng)提供穩(wěn)定的2.5v直流電壓,從而實現能量自供給。半主動控制系統(tǒng)結構簡單且易于實現,同時本文中所采用的無源開關控制電路功耗極低,可以實現半主動控制系統(tǒng)的能量自供給。通過實驗對比發(fā)現SSDS、改進型SSDS、SSDI及SSDV的抑振效果逐漸增強,與理論推導結果相吻合。其中,SSDV在振動能量收集電壓2.5v的作用下,達到了較好的控制效果。
[Abstract]:Vibration is common in nature. However, vibration is usually harmful to structures, so it is important to control vibration. However, the active control system in vibration control is large in volume and energy consuming, but the adaptability of passive control environment is poor. Therefore, semi-active control has become the first choice in many situations. In this paper, piezoelectric semi-active control and piezoelectric energy collection technology are combined to control vibration effectively and realize energy collection at the same time. Based on the electromechanical coupling characteristics of piezoelectric materials, a theoretical model for the semi-active control system of nonlinear synchronous switching damping (SSD) is established in this paper. On this basis, the working principle of SSD technology (including the improved SSDI,SSDS,SSDV, SSDS) is analyzed, and the expressions of the electromechanical conversion energy values of each control method within a period are derived. For the key technology of this technology-switch design, this paper adopts a passive peak detection switch circuit to realize its function, and deduces in detail that it can realize different closing time when it is combined with SSDI,SSDS technology. At the same time, the optimal external voltage of the SSDV technology in the semi-active control system is determined by experiment. Secondly, the circuit of the semi-active control system is improved to output or store the charge generated by the piezoelectric element in the process of vibration. Its working principle is analyzed theoretically, and its output voltage and output power are deduced in detail. Finally, the energy collection technology is combined with SSDV semi-active control. According to the experimental results, a suitable voltage regulator circuit is designed to provide a stable 2.5v DC voltage for the SSDV semi-active control system through a certain switching control strategy. Thus the self-supply of energy can be realized. The structure of the semi-active control system is simple and easy to implement. At the same time, the passive switching control circuit adopted in this paper has very low power consumption, which can realize the energy self-supply of the semi-active control system. Through the experimental comparison, it is found that the anti-vibration effect of SSDS, improved SSDS,SSDI and SSDV is gradually enhanced, which is in agreement with the theoretical results. Among them, SSDV has achieved better control effect under the action of 2.5 v vibration energy collection voltage.
【學位授予單位】：南京航空航天大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TB53

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相關碩士學位論文 前1條

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本文編號：2446348